Electric-circuit lock.



D. W. WILT. l ELECTRIC GIBGUIT LOCK. I AI'PLIGMION FILED Auzs, 1911.

Patented; 11h22, 1913.

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D. W. WILTC i ELECTRIC CIRCUIT LOCK. APPLICATION FILED AUG. 26, 1911.

1,059,583@ Patented M1222, 1913.

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WMe/ceo t rra DORAH W. WILT, 0F SAN DIEGO, CALIFORNIA.

ELECTRIC-CIRCUIT LOCK.

Specicatcn of Letters Patent.

Patented Apr. 22, 1913.

Application led August 26, 1911. Serial No. 646,275.

To all whom, t may concern.'

Be it known that I, DORAH W. WILT, a citizen of the lUnited States, residing at San Diego, in the State of California, have invented new and useful Im rovements in Electric-Circuit Locks, of which the following is a specification.

The general object 'of the invention is to lock in open position, the closer .or controller of an electric circuit'for delivering current either to an electric motor or to the ignition apparatus of an internal combustion engine, and to this end the invention is adapted for use chiey, with motors for operating propelling devices of conveyances such as motor vehicles, airships, boats and the like.

Other objects will appear and be better understood from the following description taken n connection with the accompanying drawings, in which,

Figure -1 is. a front elevation of one em# -bodiment of the invention. Fig. 2 is a view similar to Fig. l but with the. door or closure in open position. Fig. 3 is a detail of the lock mechanism showing the position of the parts whenthe door is locked. Fig. 4; is a detail side elevation of the door with the flange thereofand part of the lock-bolt broken away. Y

In the embodiment shown in the drawgs the device is used in connectionv with what is known as a coil box which contains the spark coils formin part of the ignition circuit for an interna combustion engine.

vAt the outset it may be stated that this construction is shown merely 4to illustrate one application ofthe invention and, therefore, I` do not intend to limit myself to such use for the reason that the device is not dependentupon any particular form of ign1 tion circuit and might be used equally as well with an ignition circuit Jfrom which spark coils a're eliminated, such as where magnetos generate the current and moreover I do not intend that I shall be limited to use my device only with an ignition circuit, since the same may also@i be employed with the circuit of an electric motor, such as is found' in Various types of `self-propelled vehicles.

5 indicates the body of the box or casing which on account of its association with the usual controlling switch 6, will subsequently be termed the switch box. This term is generic and intended to apply to the ordinary coil box or a box similar to that shown, but minus the coils. 7 indicates the closure for the box which may be a door or cover and may be detachably connected to tbe box or hinged thereto as indicated at 8. 9, 9 indicate the conducting wires of an'electric circuit in which is included the switch G, coil 10 and the contacts 11, 11. These parts are all contained in the casing and supported therein, in any preferred manner, preference being given to construction wherein the contacts or sockets 11 are supported by the door 7.

a indicates generally a permutation lock, the knob or handle of which isv designated by 12 and arranged exteriorly of the door 7.v The 'dial is indicated by 13 and tle tumblers by 14, the latter, as usual, being arranged interiorly of the casing when the door is closed.

15 indicates the bolt of a latch which has end projections ,16 extending through the inturnediiange 17 of the door and adapted to move over the inner side of a keeper 18, herein shown as a strip extending inwardly from a side of the box.

19 indicates a handley extending through a slot 20 in the door and connected with the bolt 15 so as to slide the latter, whereby, to disengage the portion 16 from the keeper 1S.

b indicates a device adapted, when in one position, to vobstruct the bolt 15, In the present instance this device, in addition to providing an obstruction for the bolt, is further adapted to act as a controller or closer for the electric circuit and is constructed so as to be received by the contacts 11 when the door is unlocked.

19 indicates a pivot for connecting-*the element b to the door 7 and 20 a handle at .the outer end of the pivot which serves as a means for turning the element 7J. The element b is preferably of non-conducting material but the end portion 21 thereof is preferably covered with conducting material such as metal, so asV to complete the circuit when in engagement with the contacts 11. The end or side portion 22 of the element ZJ is disposed angularly to the portion 21 and has a cam linger 23 adapted to be received by the notches 24: of the disks 11i when the lsaid notches are all in alinement as shown in Fig. 2.

25 indicates a projection on the element Z) adapted to abut the bolt 15 when the door is locked, as shown in Fig. 3.

`26 indicates a spring for projecting the extension 16 through the flange 17.

27 and 28 indicate stops for limiting the inward movement of the bolt, one of which also limits the turning movement of the element I).

Suitable fastening means such as screws` 29, pass through the bottom or inner wall of the box and serve to connect the'same to any convenient portion of the vehicle or other device to which the box is applied.

30 indicates screws which pass through the door 7 and screw into any convenient part in the interior of the casing so as to prevent the door frombeing easily opened when the said door is unlocked.

If the door be in open position and the notches in the disks in alinement and the cam linger 23 in the notches, the portion 2l of the element o or circuit closer will be in engagement with the contacts 11, 11 and thus the circuit will be complete. Now if the .door be swung to closed position, the project-ions 16, 16 will move behind the keeper 18, whereby, the door will be latched bnt not to prevent its being opened again if the bolt be yslid by moving the handle 19 in the required direction. It will also be observed that the circuit is still closed when the door is so latched. This will be the normal positions of the parts when the motor is operating and the screws 30, which now secure the door to the casing will prevent the said door from being opened easily. Now, if the motor be stopped, the current may be turned off by turning the switch 6 in the required direction. This, however, does not prevent the completion of the circuit when the switch is again turned on. Now in order to prevent the switch 6 from completing the circuit. if turned on as last stated, the knob 12 of the lock a is turned so as to move the disks clockwise as viewed in Fig. 2. This will have the eiiect of carnming the element o to the position shown lin Fig. 3, whereby, the side portion 21 will move from engagement with the contacts 11and at the same time the projection 25 will move into the path of the projection 32 of the bolt 15. In this position, it will be seen that the end of the cam linger now bears on the periphery of the tumblers or disks 14 and in as much as the notches in the latter are now out of alinement it will be necessary to know how to manipulate the knob 12 so as to bring the notches 24 again into alinement and this combination, of

course, will be only known to the operator,

orsome authorized person. Thus, it will be seen that when the door is locked in closed position against opening movement, the circuit will be broken, and when unlocked and capable of latching, the circuit willr be closed. When the tumblers are arranged so that the slots therein aline, the element t is actuated to dispose the linger 23 within the alining slots or notches and the arm 21 thereof engages the contacts 11 to effect the closing of the circuit. By so arranging the parts as to enable the circuit t-o be closed only when the door is unlocked,

admits of readily inspecting the contactsv when poor ignition is observed, without the trouble of manipulating the lock to permit the withdrawal of the latch.

Although 1 have shown and described one embodiment of my invention it is to be understood that I am not to be limited to the specific arrangement and construction of parts since various changes will be made, within the scope of the appended claims without departing from the spirit or sacricing any of the advantages of the invention.

What I claim as new is:

1. The combination with a switchv box and a removable closure therefor, of a circuit extending through the box, a latch for said closure, a rocking element disposed within said box and comprising relatively angular arms, said elementbeing also provided with a projection adapted to lie in the path of movement of said latch, one of said arms being adapted to break the circuit, and rotatable means associated with the other arm for maintaining the first mentioned arm in a position to close the circuit.

2. The combination with a switch box and a. removable closure therefor, of a circuit extending through the box, a latch for said closure, a rocking element disposed within said box and comprising relatively angular arms, said element being also provided with a projection adapted to lie in the path of movement of said latch one of said arms being adapted to break the circuit, rotatable means associated with the other arm for maintaining the rst mentioned arm in a p0- sition to close the circuit, and means or limiting the movement of said rocking element.

3. .The combination with a switch box and a removable closure therefor, of a circuit extending through said box, a latch for said closure, and extending longitudinally of said casing, means fornormally retaining the latch in latchin position, a rocking element disposed within the box and comprising relatively angular arms provided with a projection `adapted to lie in the path of move- In'testmony whereof I' aix my signature ment of said latch, one of the arms of said in presence of two Witnesses. element being adapted to break the circuit, DORAHW. WILT. and rotatable means associated with 'the Witnesses:x i 5 other arm for` maintaining the first men-v Y GEO. E. JOHNSON, tioned arm in a position to close the circuit. GnouJ C. GATES.

Copies of this patentmay be obtained for ve cents each, by addressing the Commissioner of Patents.

j Washington, D. C. K 

